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Early-life lessons of the courtship dance in a dance-duetting songbird, the Java sparrow

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Title: Early-life lessons of the courtship dance in a dance-duetting songbird, the Java sparrow
Authors: Soma, Masayo Browse this author →KAKEN DB
Iwama, Midori Browse this author
Nakajima, Ryoko Browse this author
Endo, Rika Browse this author
Keywords: Audio-visual communication
Courtship dance
Estrildid finch
Social development
Issue Date: Jun-2019
Publisher: Royal Society
Journal Title: Royal Society open science
Volume: 6
Issue: 6
Start Page: 190563
Publisher DOI: 10.1098/rsos.190563
Abstract: Vocal learners, such as songbirds, must practise singing in a developmentally sensitive period to master songs. Yet, knowledge remains limited about the development of visual displays in birds, even when courtship includes wellcoordinated vocalizations (songs) and body motions. The Java sparrow (Lorichura oryzivora) is a species of songbird that exhibits a courtship duet dancing exchange between the sexes, with this behaviour driving mating success. In this study, juvenile male Java sparrows were observed in captivity, showing that they repeatedly practise the courtship dance in their early life. We called it 'practice', as juvenile birds frequently dance towards family members or other juveniles well before sexual maturation. Based on our observation that dance motor performance increased with age, we propose that the practice is needed for motor learning. In addition, it could also be important for establishing vocal-motional coordination or socialization. Older juveniles gradually became capable of singing and dancing simultaneously, and participated in duet dancing more often. We also found that repeated encounters with the same individual promote dance movement. Though our results do not show how much social experiences account for the development of dance communication, early-life dance practising might influence future reproductive success, like song practising does.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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